1)  download and complile ncurses-5.7
2)  sudo make install  /* Install ncurses library */
3)  tar xfjv busybox-1.13.2.tar.bz2

4)  cd busybox-1.13.2
5)  tar xfzv ../udpcast-20081213.tar.gz
6)  (cd udpcast-20081213  && ./configure)
7)  tar xfzv ../udpbusybox-20081130.tar.gz
8)  ../addBbApp.pl udpcdialog udpcast-20081213
9)  make defconfig  /* Create the maximum "sane" configuration. */

10) vi Makefile, modify line to LDLIBS := pthread ncurses
11) make

But i got following error message:
udpcdialog/lib.a(udpc_dialog.o):(__libc_atexit+0x0): undefined reference to '_IO_cleanup'

collect2: ld returned 1 exit status
make: *** [busybox_unstripped] Error 1

I think that the problem is with shared libc library. 
nm result as follows:
$ nm /usr/lib/libc.a | grep _IO_cleanup

         U _IO_cleanup
00001330 T _IO_cleanup
00000000 r __elf_set__libc_atexit_element__IO_cleanup__
         U _IO_cleanup

I need help !!!

wanyozxy